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C. E. SORIBNER.v

ARG LAMP. No. 415,572. Patented Nov. 19, '1889.

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No.1115,572.l Patented Nov. 19, 1889.

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(No Model.) 3 Sheets-Sheet 3.

C. E. SGRIBNER.

ARG LAMP.

No. 415,572. Patented Nov. 19, 1889.

UNITED STATES vPATENT OEEICE.

CHARLES E. SCEIBNEE, OE CHICAGO, ILLINOIS, AssIGNOR To THE WESTERNELECTRIC COMPANY, OE SAME PLACE.

A RC LA M P SPECIFICATION forming part of Letters Patent No. 415,572,datedNovember 19, 1889.

Application filed December 22,1884. Serial No. 151,0044. (No model.)

To all whom it may concern: to the same support or lever and work uni-Be it known that I, CHARLES E. SCRIBNER, formly. a citizen of the UnitedStates, residing'at Chi- In the drawings, Figure l is a front elevacago,in the county of' Cook andState of Illition of a portion of anelectric-arc lamp emvnois, have invented a certain new and usefulbodying my improvements. Fig. 2 is a side 55 Improvement inDouble-Carbon Arc Lamps, elevation of the regulating and transfermechof. which the following is a full, clear, concise, anism of thesame, certain parts bein g broken and exact description, reference beinghad to away. Fig. 3 is a planview as seen from secthe accompanyingdrawings, forming a part tion-line o: c of Fig. 2. Fig. 4 is a diagramro of this specification. illustrative of the circuits. Fig. 5 is a de-6o My invention relates to electric-arc lamps; tailed view of theannular clutch which susand it consists in the combination of mechtainsthe second carbon-rod until the first caranisln whereby two sets ofcarbons may be bon-rod is finally arrested in its descent.

` used in the same lamp. Like parts are indicated by similar letters Inmyapplication,SerialNo.11G,102,forelecof reference throughout thedifferent figures. 6 5 tric lamps filed December 31, 1883, I have de-The lifting-magnet a, of coarse wire, is inscribed and claimed certainregulating mecheluded in the main circuit, and the feedinganism forsingle-carbon electric lamps. In magnet b, of fine wire, in a shunt ofthe arc the lamp herein described I make use ot simiin the usual manner.The lever c carries two zo lar regulating mechanism modified so as to beclutches d c, of well-known construction. 7o adapted to double-carbonelectric lamps. The `The first carbon-rodf is first fed by mechansecondcarbon-rod is held up by an annular ism operating in the usual Inanneruntil the clutch while the first carbon is burning. The rod is arrestedin its descent by the collar f first carbon-rod is finally arrested inits decoming against stop f2, as shown in Fig. 2.

scent, and the arc of its carbon increases un- The arc then continues toincrease in length, 75 til the magnet in the shuntof the arc draws andconsequently in resist-ance, until suffiits armature to a contact-pointconnected cient current is sent through magnet l) to through a solenoidor electro-magnet, which Ymove armature-lever g into Contact withconoperates the annular clutch which sustains tact-point 71, closing`the circuit of retailithe second carbon-rod. The second carboningelectro-magnet or solenoid fz'. This arma- 8o rod is thus releasedv andfalls, shunting out ture-lever g, I have shown in the form of the arc ofthe first set of carbons and the iinea bell-crank, withconnecting-levers p and q, wire electro-magnet. The fine-wireelectrowhereby motion of the lever gis Communimagnet is thusde-energized, and the' spring cated to the lever c,'upon which theclutches 3 5 opposing the attraction of its armature by are. mounted.This feeding-lever mechanism, 85 pressure upon its armature-leverthereupon it will be seen, is operated gradually as the operates toseparate the second set of carbons arc increases in length. Thismechanism is and establish the arc. Before the first arc is so adj ustedthat the clutches are opened to established the rod of the second set ofcar- `cause the rods to feed at the proper mom-ent.

4o bons is raised and clamped by the annular The feeding-levermechanism, in addition to 9o clutch, in which position it is held untilthe operating the clutches, acts as a switch to first rod is arrested inits descent. The first close the circuit of the retaining-magnet forIod, after the arc of its carbon is established, the purpose of shiftingthe arc from the first continues to descend until finally, while the setof carbons to the second set of carbons.

arc continues to burn,it is arrested by a stop. The annular clutch Za isthus lifted and the 95 Vhen, therefore, the currentis cut off and thecircuit is closed at a point Z, thus holding said first arc goes out,the rst set of carbons will annular clutch up out of engagementv withthe remain separated. The feeding-clutches of second rod m during theremainder of the the two rods are not both actively in use at time thatthe lamp is burning. The rod m,

5o the same time. They are, however, attached being thus released,descends until the second 10o set of carbons are brought together. rlhearc of the first set of carbons is thus shunted and goes out, and thestrength of the current through t-he electro-magnet h is so weakened that the armature-lever g is carried away from the poles of said magnet bythe force of spring n, which presses against the adjustable screw n',passing through the lower part of the bellcrank or armature-lever g. Thelink or rod o, attached to lever p and lever c, is thus carried up, andwith it the lever c and clutch c. The second set of carbons are thusseparated and the are established.

Vhen the clutch CZ of carbon-rod f comes against its opposing stop andopens, permitting said rod f to descend, the other rod mis heldsuspended bythe annular clutch 7c. On the other hand, when the rod m isreleased by its clutch e, the first rod f is held suspended by the stopf. It will thus be seen that the weight of only one rod and its carbonbears upon the lever c at the moment of feeding as long as the lampcontinues to burn.

The clutches d and e come against their opposing stops d esimultaneously, and they are opened simultaneously. The moment of feedwith relation to theA length of arc is therefore the same, no matterwhich rod is feeding-that is to say, while the first set of carbons isburning the iirst rod feeds at the moment the arc becomes of a givenlength, and while the second set of carbons is burning the second rodfeeds when the arc is of the length of the arc of the first set at themoment of feeding. The arc of the lamp is thus maintained at a uniformlength, no matter which set of carbons may be burning.

I claiml. The combination, in a double-carbon electric-arc lamp, of asolenoid or electromagnet and its armature, a clutch controlled by saidarmature, a rod supported `by said clutch, and a contact-point Z,whereby the circuit may be closed and maintained through the saidelectro-magnet or solenoid and the clutch held out of engagement withits rod, substantially as and for the purpose specified.

2. The combination, with a solenoid or electro-magnet and its armature,of the clutch and one of the two rods of the lamp, the circuit,contact-point 7L, and the feeding mechanism, whereby the said circuit isclosed through said contact-point h and the solenoid or electro-magnet,substantially as and for the purpose specified.

The combination, with a solenoid or electro-magnet and its armature, ofthe clutch and one of the two rods of the lamp, which is adapted to besustained by the said clutch, circuits through the said solenoid, twoswitching devices connected with said circuits to close the circuit ofthe said solenoid, one of the switches being controlled by the feedingmechanism of the lamp and the other being controlled by thesolenoid-armature, whereby the circuit of said solenoid may be closed torelease the carbon-rod and its armature held suspended during theoperation of the lamp.

4. The combination, with the two sets of carbons and the carbon-rods, ofthe retainingmagnet, which is connected with the clutch which normallysupports the rod of the second set of carbons, a circuit through saidretaining-magnet,with contacts adapt-ed to be closed by the feedingmechanism of the lamp, whereby the clutch may be lifted by theretaining-magnet and the second carbon-rod set free and the clutchretained during the operation of the lamp.

In witness whereof I hereunto subscribe my name this 26th day ofNovember, A. D. 1884-.

CHARLES E. SCRIBNER. lVitnesses:

GEORGE P. BARTON, I IAnRIsoN P. NICI-Ions.

